Abstract: Provided is an image forming apparatus including a plurality of paper feeding cassettes, a paper detecting sensor, a detecting sensor, a paper feeding switching determination part, and a system control part. The paper feeding switching determination part confirms a state change in the paper feeding cassettes, after the elapse of awaiting time until a start of determination of whether or not switching of paper feeding is possible, if it is determined that a document stored in the paper feeding cassettes runs out, based on an operating condition of the apparatus, a change in detection results by the paper feeding detecting sensor, and detection results by the detecting sensor, and determines whether or not the switching of paper feeding is possible. The system control part controls the switching of paper feeding based on the determination results by the paper feeding switching determination part.

Abstract: Provided is an image forming apparatus including a plurality of paper feeding cassettes, a paper detecting sensor, a detecting sensor, a paper feeding switching determination part, and a system control part. The paper feeding switching determination part confirms a state change in the paper feeding cassettes, after the elapse of awaiting time until a start of determination of whether or not switching of paper feeding is possible, if it is determined that a document stored in the paper feeding cassettes runs out, based on an operating condition of the apparatus, a change in detection results by the paper feeding detecting sensor, and detection results by the detecting sensor, and determines whether or not the switching of paper feeding is possible. The system control part controls the switching of paper feeding based on the determination results by the paper feeding switching determination part.

Abstract: The respective jobs of copying, printing, scanning, and faxing processed by an integrated application are unitarily divided into four job steps. A package of function modules selectively used in the respective jobs is classified into four groups of input, create, edit, and output function modules according to the division. A data format is unified into bitmap by a create function module, and the bitmap data is processed by an edit function module for pagination or aggregation, etc. In response to receiving setting information and a job code, a job controlling module creates job step control blocks and writes the information therein to create a job. Each of job step controlling (JSC) modules to starts a function module for each page, and after the completion thereof, creates a thread control block for the next downstream side JSC module.

Abstract: An operation control program controls a computer provided in an image forming apparatus to serve as: a service section which discriminates an operation of a service requested by a user, and constructs a job corresponding to the operation by selecting one or a plurality of job scenarios prepared in advance as constituting element of the job and using the selected job scenario; and a job performing section for executing sequentially a processing indicated by each job scenario constituting the job constructed by the service section.

Abstract: An operation control program controls a computer provided in an image forming apparatus to serve as: a service section which discriminates an operation of a service requested by a user, and constructs a job corresponding to the operation by selecting one or a plurality of job scenarios prepared in advance as constituting element of the job and using the selected job scenario; and a job performing section for executing sequentially a processing indicated by each job scenario constituting the job constructed by the service section.

Abstract: The respective jobs of copying, printing, scanning, and faxing processed by an integrated application are unitarily divided into four job steps. A package of function modules 41A selectively used in the respective jobs is classified into four groups of input, create, edit, and output function modules 410 to 412 according to the division. A data format is unified into bitmap by a create function module 411A, and the bitmap data is processed by an edit function module 411B for pagination or aggregation, etc. In response to receiving setting information and a job code, a job controlling module 43A creates job step control blocks 440 to 442 and writes the information therein to create a job. Each of job step controlling (JSC) modules 450 to 452 starts a function module for each page, and after the completion thereof, creates a thread control block for the next downstream side JSC module.